Buggy code:
public class GlowingChickenConfig { public static Configuration config ; private static File configFile ; public static String path ; public static boolean immuneToFire ; public static boolean waterDamage ; public static double damageByWater ; public static boolean burnsInLight ; public static int id ; public static int spawnProb ; public static int minSpawn ; public static int maxSpawn ; public static boolean emitsParticles ; public static String particleType ; public static int [ ] blacklistSpawn ; public static double health ; public static double speed ; public static boolean spawn ; public static boolean emitsLight ; public static int lightLevel ; public static boolean untamedDespawn ; public static boolean tamedDespawn ; public static double minTemp ; public static double maxTemp ; public static String tameItemType ; public static int tameItemData ; public static boolean tameItemUsesData ; public static String tameItem ; public static int tameChance ; public static String temptItemType ; public static int temptItemData ; public static boolean temptItemUsesData ; public static String temptItem ; public static String breedItemType ; public static int breedItemData ; public static boolean breedItemUsesData ; public static String breedItem ; public static int varItemLayTime ; public static int minItemLayTime ; public static String layItemType ; public static int layAmount ; public static int layItemData ; public static boolean layItemUsesData ; public static String layItem ; public static String laySound ; public static int followDelay ; public static boolean allowBabies ; public static boolean canTeleport ; public static boolean isHostile ; public static float attackDamage ; public static int [ ] effectIds = new int [ ] { 16 , 8 } ; public static int [ ] effectDurations = new int [ ] { 500 , 400 } ; public static int [ ] effectAmplifiers = new int [ ] { 2 , 5 } ; public static Property savedEffectIds ; public static Property savedEffectDurations ; public static Property savedEffectAmplifiers ; public static boolean setFire ; public static int fireTimer ; public static double attackSpeed ; public static boolean shootsArrows ; public static int shootSpeed ; public static double trackingRange ; public static int fuseTime ; public static boolean canExplode ; public static int explosionRadius ; public static double sizeX ; public static double sizeZ ; public static int particleFrequency ; public static boolean layItemDataRandom ; public static int layItemMinData ; public static int layItemMaxData ; public static boolean layModded ; public static boolean breedModded ; public static boolean tameModded ; public static boolean temptModded ; public static void setConfigs ( FMLPostInitializationEvent event ) { } public static void setId ( FMLPreInitializationEvent event ) { } public static void spawning ( ) { } public static void entityData ( ) { ConfigComments . entityDataComments ( GlowingChickenConfig . config ) ; GlowingChickenConfig . health = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Health" , 6.0 ) . getDouble ( 6.0 ) ; GlowingChickenConfig . speed = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Walk<seq2seq4repair_space>Speed" , 0.25 ) . getDouble ( 0.25 ) ; GlowingChickenConfig . sizeX = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Hit<seq2seq4repair_space>Box<seq2seq4repair_space>Size<seq2seq4repair_space>X" , 0.3 ) . getDouble ( 0.3 ) ; GlowingChickenConfig . sizeZ = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Hit<seq2seq4repair_space>Box<seq2seq4repair_space>Size<seq2seq4repair_space>Z" , 0.7 ) . getDouble ( 0.7 ) ; GlowingChickenConfig . untamedDespawn = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Despawn<seq2seq4repair_space>Untamed" , true ) . getBoolean ( true ) ; GlowingChickenConfig . tamedDespawn = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Despawn<seq2seq4repair_space>Tamed" , false ) . getBoolean ( false ) ; GlowingChickenConfig . isHostile = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Hostile" , true ) . getBoolean ( true ) ; GlowingChickenConfig . allowBabies = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Allow<seq2seq4repair_space>Breeding" , true ) . getBoolean ( true ) ; GlowingChickenConfig . canTeleport = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Allow<seq2seq4repair_space>Teleporting" , false ) . getBoolean ( false ) ; GlowingChickenConfig . emitsLight = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Emits<seq2seq4repair_space>Light" , true ) . getBoolean ( true ) ; <START_BUG> GlowingChickenConfig . lightLevel = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Light<seq2seq4repair_space>Level<seq2seq4repair_space>Emited" , 16 ) . getInt ( 16 ) ; <END_BUG> GlowingChickenConfig . immuneToFire = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Immune<seq2seq4repair_space>To<seq2seq4repair_space>Fire" , true ) . getBoolean ( true ) ; GlowingChickenConfig . burnsInLight = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Burns<seq2seq4repair_space>in<seq2seq4repair_space>Sun" , false ) . getBoolean ( false ) ; GlowingChickenConfig . waterDamage = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Gets<seq2seq4repair_space>Hurt<seq2seq4repair_space>by<seq2seq4repair_space>Water" , false ) . getBoolean ( false ) ; GlowingChickenConfig . damageByWater = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Damage<seq2seq4repair_space>From<seq2seq4repair_space>Water" , 0.0 ) . getDouble ( 0.0F ) ; GlowingChickenConfig . emitsParticles = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Emits<seq2seq4repair_space>Particles" , false ) . getBoolean ( false ) ; GlowingChickenConfig . particleType = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Particle<seq2seq4repair_space>Type" , "none" ) . getString ( ) ; GlowingChickenConfig . particleFrequency = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Particles<seq2seq4repair_space>Per<seq2seq4repair_space>Tick" , 0 ) . getInt ( 0 ) ; } public static void taming ( ) { } public static void tempting ( ) { } public static void breeding ( ) { } public static void laying ( ) { } public static void attackData ( ) { } }

Fix:
GlowingChickenConfig . lightLevel = GlowingChickenConfig . config . get ( "entity<seq2seq4repair_space>data" , "Light<seq2seq4repair_space>Level<seq2seq4repair_space>Emited" , 15 ) . getInt ( 15 ) ;